package com.reggie.lotterysystem.common.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;

import java.util.Collection;
import java.util.concurrent.TimeUnit;

@Configuration
public class RedisUtil {

    private static final Logger logger = LoggerFactory.getLogger(RedisUtil.class);

    /**
     * RedisTemplate:先将被存储的数据转换成 字节数组（不可读），再存储到redis中，读取的时候按照字节数组读取
     * StringRedisTemplate:直接存放的就是 string (可读)
     */
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 设置值
     * @param key
     * @param value
     * @return
     */
    public boolean set(String key,String value){
        try{
            stringRedisTemplate.opsForValue().set(key,value);
            return true;
        }catch (Exception e){
            logger.error("RedisUtil error,set({},{})",key,value,e);
            return false;
        }
    }

    /**
     * 设置值（设置过期时间）
     * @param key
     * @param value
     * @param time
     * @return
     */
    public boolean set(String key,String value,Long time){
        try {
            stringRedisTemplate.opsForValue().set(key, value,time, TimeUnit.SECONDS);
            return true;
        }catch (Exception e){
            logger.error("RedisUtil error,set({},{},{})",key,value,time,e);
            return false;
        }
    }

    /**
     * 获取值
     * @param key
     * @return
     */
    public String get(String key){
        try{
            return StringUtils.hasText(key) ?
                    stringRedisTemplate.opsForValue().get(key)
                    : null;
        }catch (Exception e){
            logger.error("RedisUtil get({})",key,e);
            return null;
        }

    }

    /**
     * 删除值
     * @param key
     * @return
     */
    public boolean del(String... key){
        try {
            if (null != null && key.length > 0){
                if (key.length == 1){
                    stringRedisTemplate.delete(key[0]);
                }else {
                    stringRedisTemplate.delete(
                            (Collection<String>)CollectionUtils.arrayToList(key)
                    );
                }
            }
            return true;
        }catch (Exception e){
            logger.error("RedisUtil del({})",key,e);
            return false;
        }
    }

    /**
     * 判断key是否存在
     * @param key
     * @return
     */
    public boolean hasKey(String key){
        try{
            return StringUtils.hasText(key) ?
                    stringRedisTemplate.hasKey(key)
                    : false;
        }catch (Exception e){
            logger.error("RedisUtil hasKey({})",key,e);
            return false;
        }
    }

}
